Zabbix

.......PS. [DEV-2316] refactored export library

* commit '0f8e6a412979d0781f1ec924a0a65edfbfb872a4':
  .......PS. [DEV-2316] fixed minor warnings
  .......PS. [DEV-2316] added memory callbacks to export library
  .......PS. [DEV-2316] fixed null pointer referencing
  .......PS. [DEV-2316] fixed thread based memory leak in export library
  .......PS. [DEV-2316] added deinit function for export library
  .......PS. [DEV-2316] fixed expression
  .......PS. [DEV-2316] removed structure allocation in zbxexport
  .......PS. [DEV-2316] refactored export library